code: def testRegression(self):
      input = [45, 78, 1, -5, -0.1125, 1.236, 10.25, 100, 9, -78]
      self.assertAlmostEqual(ZeroCrossingRate()(input), 3.0 / 10.0)
  
file_path: essentia/test/src/unittests/temporal/test_zerocrossingrate.py
imports: from essentia_test import *
label_desc: Use image node_id 6 for calling the TestZeroCrossingRate obj's underlying member method code with example usage: obj.testRegression() without return types